Brake-shoe.



G. W. KUCHER.

- BRAKE SHOE.

APPLICATION FILED JUNE 13, 191i.

1,05 1, 1 25, I Patented Jan.21, 1913.

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"M11111! HI 01:!!! HEIH u Frill M 1 11 211mm] WEHWFTWWF To all whom it may concern:

of Seattle, in the county of of Washington,

BRAKE-SHOE.

Specification of Letters Patent.

Patented} Jan. 21,1913.

Application filed June 13, 1911. Serial No. 832,389.

Be it known that LAOHARLES W. KUoHER, a citizen of the United States, and a resident King and State have invented certain new and useful Improvements in Brake-Shoes, .of which the following is a full, true, and exact specification, which. will enable others skilled in the art to construct the same The rincipal object of this invention is to provide a brake shoe of substant1ally .the general contour of an ordinary brake shoe, but due to the improved constructlon of which, the life of the shoe is greatly prolonged and a greater braking efliciency secured.

Other objects will appear as the inventlon is more fully hereinafter described and shown in the accompanying drawings, in Which Figure 1 is a longitudinal sectional view of the device upon the line ww of Fig. 2. Fig. 2 a rear View; Fig. 3 an enlarged detailed front view of the face plate before the metal is poured around it. Fig. 4

is aside view of the same. Fig. 5 an edgewise view of the spiral spring member; Fig. 6 a side view of the same.

Referrin now more particularly to the drawings, m numeral 1 designates the main body of the shoe, 2 a projection through which is the perforation 3 which receives a key which secures the shoe to the brake head in the usual and wellknown manner. All of the parts so far described maybe of the usual construction.

6 is a sheetof relatively soft steel which is bent to confohn to the curye of the main body 1. From the sheet 6 are upwardly ben't the fingers 7r, leaving the open slots 8 through-the sheet 6, some of the fingers 7 being bent only slightly upwardly and others at approximately right angles to the sheet (Fig. 4.)

9 is a sinuous member formed from a sheet of slightly spring material and between the convolutions of which are adapted to enter 7. The formation of the device is such that thefingers 7 are introduced between the convolutions of the sinuous member 9' (Fig. 1) and the molten metal poured so that the main body 1 is cast allowmg the molten metal to flow around and envelop the fingers 7 and convolutions of the member 9 whereby the members 6 and 9 with their fingers and convolutions and the main body 1 becomes substantially an integral piece as is clearly shown in Fig. 1.

From the foregoing it is believed that the construction and operation of my device will be fully understood by those skilled in the art.

- It is clear that the brake face of the shoe is yielding in its nature due to the fact that the braking face of the cast iron is di- B erases rn'rnn'r orricn.

vided into the relatively thin ortions which lie between the fingers 7 an the convolutions of the sinuous member 9, and for that reason will readily conform to the periphery of the wheel and grip the same firmly. It is also clear that if these pieces of the cast iron between the fingers 7 should be broken from the main body anywhere along the braking face of the same they would'be held approximately in position by the fingers 7.

i The material of which the spring fingers 7 is formed is much softer than the casting which surrounds them and for that reason Wears more rapidly than the cast iron. The ends of some of the'fingers 7 project. entirely through the cast iron brakin face and contact directly with the perlphery of the.

wheel and grit, sand, or other particles which happen to be caught between the brake face of the shoe and the periphery of the wheel is rolled along by the movement of the wheel'until the grit, sand, or other particles contacts with the end of one of the fingers 7 when it is ground into and against the same thus slightly reducing the length of thefin ers so that the same is below the surface 0 the cast iron face. Thus it will be seen that in practice the ends of the fingers 7 are kept worn slightly below the braking face of the cast iron and thereby create somewhat of a suction action.

I am fully aware that many changes and details of construction will readily suggest themselves to those skilled in the art with out departing from the spirit and scope of the invention and I do not therefore desire to be limited to the exact, construction shown.

What Iclaim as new and desire to protect by Letters Patent of the United States is- In a brake shoe a main body adapted to be cast around a sheet metal portion of relasaid fingers so that the whole forms a sub tivel soft resilient material having upstantially integral piece when cast. stan ing fingers inte a1 with said sheet and extending through t e braking face, a sec- CHARLES KUCHER' 5 0nd set of fingers at angles to.-said first Witnesses:

mentioned fingers and a sinuous member of F. P. GORIN,

resilient material fitted edgewise between H. RUPERT. 

